Database.com Metadata API Developer's Guide - Salesforce.com

Metadata TypesWorkflowField NameField TypeDescriptionThis API version is used in API calls back to Database.com usingthe enterprise or partner WSDLs. The API Version can only bemodified by using the Metadata API. It can't be modified using theDatabase.com user interface. This field is available in API version18.0 and later.Warning: If you change the apiVersion to a versionthat doesn't support one of the fields configured for theoutbound message, messages will fail until you update youroutbound message listener to consume the updated WSDL.You can monitor the status of outbound messages fromSetup by clicking Monitoring > Outbound Messages inDatabase.com.descriptionendpointUrlfieldsfullNameincludeSessionIdintegrationUsernameprotectedstringstringstring[]stringbooleanstringstringbooleanDescribes the outbound message.Required. The endpoint URL to which the outbound message issent.The named references to the fields that are to be sent.Required. The developer name used as a unique identifier for APIaccess. The fullName can contain only underscores andalphanumeric characters. It must be unique, begin with a letter, notinclude spaces, not end with an underscore, and not contain twoconsecutive underscores. This field is inherited from the Metadatacomponent.Required. Set if you want the Database.com session ID included inthe outbound message. Useful if you intend to make API calls andyou do not want to include a username and password.Required. The named reference to the user under which this messageis sent.Required. A name for the component. Available in version API16.0 and later.Required. Indicates whether this component is protected (true)or not (false). Protected components cannot be linked to orreferenced by components created in the installing organization.WorkflowRuleThis metadata type represents a workflow rule. It extends the Metadata metadata type and inherits its fullName field.Field NameactionsactivebooleanFilterField TypeWorkflowActionReference[]booleanstringDescriptionAn array of references for the actions that should happenwhen this rule fires.Required. Determines if this rule is active.For advanced criteria filter, the boolean formula, forexample, (1 AND 2) OR 3.174